Hi,
I agree with Hadriel. Just because we may have to work on something
("what are the current problems"), e.g. ragarding indication of support,
it doesn't mean we shouldn't do it.
Regards,
Christer
>I think he's saying it's something that could be resolved by
>standardization. (maybe)
>
>At least the way I read your draft, the draft makes arguments
>against INFO of two different types, as if they were of
>similar weight and impact - but that's not really the case.
>There is one set of problems with INFO that exist because of
>architectural issues, which are probably not fixable, and are
>generally damning. There is a separate set which are
>problems merely because no standard exists for how to address
>them, but they could be resolved. This latter type is not
>really a "Why INFO is bad in general", as much as a "what the
>current problems are with INFO that we should fix if we want
>to keep using INFO".
>
> -hadriel
>
> > -----Original Message-----
> > From: Eric Burger [mailto:[EMAIL PROTECTED]
> > Sent: Friday, August 31, 2007 11:33 AM
> > To: Jeroen van Bemmel; Peili Xu
> > Cc: sip
> > Subject: RE: [Sip] INFO
> >
> > *How* do they signal what they support? In an INFO? <jk>
> >
> > -----Original Message-----
> > From: Jeroen van Bemmel [mailto:[EMAIL PROTECTED]
> > Sent: Friday, August 31, 2007 11:29 AM
> > To: Eric Burger; Peili Xu
> > Cc: sip
> > Subject: RE: [Sip] INFO
> >
> > Since INFO is mid-dialog, the endpoints can signal what
> they support.
> > It does not need to be known a priori
> >
> > Regards,
> > Jeroen
> >
> > -----Oorspronkelijk bericht -----
> > Van: "Eric Burger" <[EMAIL PROTECTED]>
> > Aan: "Peili Xu" <[EMAIL PROTECTED]>
> > CC: "sip" <[email protected]>
> > Verzonden: 31-8-07 00:03
> > Onderwerp: Re: [Sip] INFO
> >
> > Saying, "OK for interworking" does not really say anything.
> If I come
> > up with a really broken method for interworking, saying
> that it is for
> > interworking does not make it correct.
> >
> > The problem is, how do the endpoints know they will be able to
> > communicate?
> > For the ISUP/Q.sig/DPNSS/mumble case, the endpoints know
> they will be
> > able to interoperate because they know a'priori: they are
> configured
> > to work.
> > However, this means that the devices must be in the same
> > administrative domain and configured properly.
> >
> > Said in a different manner, INFO works fine for
> non-inter-network use.
> > It would be hard for the IETF to say, "Here is a non-IETF use. We
> > will not use it. You cannot use it with anyone else. You
> cannot use
> > it between manufacturers, unless you get them to agree to
> this use."
> > That is a bit more of what we call the toxic waste warning that
> > accompanies 3GPP specifications...
> >
> >
> > On 8/27/07 8:35 AM, "Peili Xu" <[EMAIL PROTECTED]> wrote:
> >
> > > Hi Eric,
> > >
> > > Several cases I encounter to use INFO is for interworking
> with PSTN
> > > signaling, or simulate PSTN services at SIP entities such
> as SIP UA
> > > or
> >
> > > SIP GW, which require mid-dialog information change.
> > >
> >
> >
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